Great depression by 2018 with 1970s-style inflation?

Three mega-trends will form the basis of the longer-term economic picture that we will come to in a moment according to the brothers. The first mega-trend, demographics, points to one billion new people on the planet with the US gaining here as compared to other industrialized nations as well as most of Asia.
The significance, according to Brian Beaulieu, involves the number of working people supporting a growing older population. In this sense, growing populations “help” the economy………………………………………..Full Article: Source